<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
	
			<div id='app'>
				下拉框：
			<select v-model="selected">
				<option value="" disabled>-请选择-</option>
				<option>A</option>
				<option>B</option>
				<option>C</option>
			</select>
			<span>value:{{selected}}</span>
			</div>
			
		
			<script src='https://cdn.jsdelivr.net/npm/vue@2.5.21/dist/vue.min.js'></script>
			<script>
				var vm = new Vue({
					el: "#app",
					
					data:{
						selected: ""
					}
				});
			</script>
			
		</body>
	</html>
	